Cala Health is seeking a Senior Firmware Engineer to join our growing team. This is a versatile, hands-on role where you will work on the full stack, from hardware support to the application itself, on low-power, wearable embedded systems.
What You'll Do
- Drive firmware development for both new product initiatives and maintenance of existing commercial fleets.
- Provide development support for hardware and peripherals, including sensors, flash memory, and wireless communication.
- Contribute to, and drive when necessary, the medical device design controls and documentation.
- Lead firmware testing efforts as required, support compliance testing, and perform joint hardware/FW debugging.
- Implement data processing algorithms efficiently and optimize code for low-power applications.
- Actively explore and implement new tools, including AI assisted development workflows.
What We're Looking For
- BS/MS in Computer Science, Computer Engineering, Electrical Engineering, or related field.
- 5+ years working in firmware applications for wearables and ultra-low-power/small footprint design.
- 2+ years experience developing firmware within a phase-gated ISO13485 medical device quality system.
- Excellent C programming skills and proficiency in Python.
- Experience with bare metal firmware development on microcontrollers such as ARM Cortex M0, M3, M4.
- Experience with relevant wireless technologies such as BLE, LTE, WiFi.
- Comfort with hardware debugging and tools such as logic analyzers, power supplies, and oscilloscopes.
- Excellent communication skills and comfort interfacing across cross-functional teams.
Nice to Have
- Experience developing within various RTOS’s such as Zephyr, Linux, freeRTOS, and comparable systems.
- Familiarity with AI-assisted development & testing tools.
Technical Stack
- C, Python, ARM Cortex M0/M3/M4, BLE, LTE, WiFi, Zephyr, Linux, freeRTOS
Team & Environment
Will work with an experienced product development team and report to an Engineering Manager.
Benefits & Compensation
- Salary range: $125,000 - $175,000
- Robust benefits package
Work Mode
This is a hybrid role based in San Mateo, CA.
Cala Health believes success is based on diversity of people, teams and thinking. Our selection process is driven by key requirements rather than bias or discrimination on the basis of a candidate’s sex, gender identity, age, marital status, veteran status, non-jobrelated disability/handicap or medical condition, family status, sexual orientation, religion, color, ethnicity, race or any other legally protected classification.



